[INFO] fetching crate background_worker 0.1.1...
[INFO] documenting background_worker-0.1.1 against master#051cab2b842113b18da28259f4b85d0a7556f7f1 for pr-104889
[INFO] extracting crate background_worker 0.1.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate background_worker 0.1.1 on toolchain 051cab2b842113b18da28259f4b85d0a7556f7f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+051cab2b842113b18da28259f4b85d0a7556f7f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate background_worker 0.1.1
[INFO] finished tweaking crates.io crate background_worker 0.1.1
[INFO] tweaked toml for crates.io crate background_worker 0.1.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+051cab2b842113b18da28259f4b85d0a7556f7f1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+051cab2b842113b18da28259f4b85d0a7556f7f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+051cab2b842113b18da28259f4b85d0a7556f7f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6741d0da953f097d9a645e6bd62c600fcb2473f8929a4a7684f5baa74552330e
[INFO] running `Command { std: "docker" "start" "-a" "6741d0da953f097d9a645e6bd62c600fcb2473f8929a4a7684f5baa74552330e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6741d0da953f097d9a645e6bd62c600fcb2473f8929a4a7684f5baa74552330e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6741d0da953f097d9a645e6bd62c600fcb2473f8929a4a7684f5baa74552330e", kill_on_drop: false }`
[INFO] [stdout] 6741d0da953f097d9a645e6bd62c600fcb2473f8929a4a7684f5baa74552330e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+051cab2b842113b18da28259f4b85d0a7556f7f1" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f120fc9cc0c27a2df1c99ee85b38c1ea6211e670c0cfcb298c5aa0b332488fb
[INFO] running `Command { std: "docker" "start" "-a" "7f120fc9cc0c27a2df1c99ee85b38c1ea6211e670c0cfcb298c5aa0b332488fb", kill_on_drop: false }`
[INFO] [stderr]  Documenting background_worker v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unclosed HTML tag `Output`
[INFO] [stdout]   --> src/lib.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |     ///     A public VecDequeue<Output> which is wrapped in a Mutex and an Arc
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::invalid_html_tags)]` on by default
[INFO] [stdout] help: try marking as source code
[INFO] [stdout]    |
[INFO] [stdout] 43 |     ///     A public `VecDequeue<Output>` which is wrapped in a Mutex and an Arc
[INFO] [stdout]    |                      +                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "7f120fc9cc0c27a2df1c99ee85b38c1ea6211e670c0cfcb298c5aa0b332488fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f120fc9cc0c27a2df1c99ee85b38c1ea6211e670c0cfcb298c5aa0b332488fb", kill_on_drop: false }`
[INFO] [stdout] 7f120fc9cc0c27a2df1c99ee85b38c1ea6211e670c0cfcb298c5aa0b332488fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+051cab2b842113b18da28259f4b85d0a7556f7f1" "rustdoc" "--lib" "-Zrustdoc-map" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46f101f492abc73bd68d43cab24ecf5ea3a8c0a82336fdd835046480fb746a63
[INFO] running `Command { std: "docker" "start" "-a" "46f101f492abc73bd68d43cab24ecf5ea3a8c0a82336fdd835046480fb746a63", kill_on_drop: false }`
[INFO] [stderr]  Documenting background_worker v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "46f101f492abc73bd68d43cab24ecf5ea3a8c0a82336fdd835046480fb746a63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46f101f492abc73bd68d43cab24ecf5ea3a8c0a82336fdd835046480fb746a63", kill_on_drop: false }`
[INFO] [stdout] 46f101f492abc73bd68d43cab24ecf5ea3a8c0a82336fdd835046480fb746a63